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What qualifies as supporting documentation to send in with Form 8453 for Form 8949 when the 1099B notes no cost basis by broker because stock was a grant upon hiring?

the only boxes filled in on 1099B are date sold, proceeds, 5 noncovered security and 6 reported to IRS gross

Best answer by DavidD66

You don't have to submit supporting documentation for cost basis, you just have to send a copy of 1099-B or a statement with the same information.

You don't have to submit supporting documentation for cost basis, you just have to send a copy of 1099-B or a statement with the same information.

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